1、Unit 4When was it invented?Section B原秀琳: To master the usage of the words : Be able to talk about the important inventions by passive voice.3.Feeling goals:Set up high dream.1885年年1876年年 1976年年1927年年1879年年1796年年1 Whats the most useful invention?2 Who was it invented by?3 When was it invented?4 What

2、is it used for?I think the most useful invention is.It was invented inby.And it is used for.Review: sourDescribe how food tastesteasweetsweetcrispy and saltypotato chipsListening (2a, 2b: P28) The potato chips were invented by mistake. 2. They were invented in 1863. 3. The customer thought the potat

3、oes werent thin enough.TFT4. The customer said they werent salty enough. 5. George wanted to make the customer happy. 6. The customer was happy in the end. FFTThe history of chips _that potato chips were invented by mistake? Chips _ _by a chef called George Crum. They were invented in_. George Crum

4、cooked them for a long time until they _And he sprinkled lots of salt on them so they were_.Did you know were invented1853were crispyreally saltyDiscuss in groups:1 賓語從句三要素：賓語從句三要素：2 enough 的用法的用法3 mistake 的用法的用法Explanation:1.The customer said they werent salty enough. 這個顧客說菜不夠咸。這個顧客說菜不夠咸。 (1)said 后

5、是賓語從句后是賓語從句, 省略了省略了that。當。當 賓語從句主句用一般過去時賓語從句主句用一般過去時, 從句也要從句也要用過去的某種時態(tài)。用過去的某種時態(tài)。 He asked me whom I was waiting for. 他問我在等誰。他問我在等誰。(2)enough 修飾名詞時修飾名詞時, 可以放在名詞之前可以放在名詞之前, 也可以放在名詞之后。如也可以放在名詞之后。如: I have enough money to buy it. ( I have money enough to buy it.enough作副詞修飾形容詞，副詞時置后。作副詞修飾形容詞，副詞時置后。Youre

6、clever enough to learn English well.He studies hard enough. 2.The potato chips were invented by mistake. 薯片是無意中被發(fā)明薯片是無意中被發(fā)明的。的。by mistake 意為意為 “錯誤地錯誤地,無意地無意地” I took his backpack by mistake. 我錯拿了他的書包。我錯拿了他的書包。 He put salt in her cup of tea by mistake. 他錯把鹽放進她的茶里。他錯把鹽放進她的茶里。 mistake 做名詞做名詞, 意為意為 “弄錯弄

7、錯, 誤解誤解” You have made a foolish mistake. 你犯了一個愚蠢的錯誤。你犯了一個愚蠢的錯誤。 mistake 作動詞作動詞, 意為意為 “弄錯弄錯,誤解誤解” She didnt speak very clearly so I mistook what she said. 她講的不清楚她講的不清楚, 所以我誤解了她的話。所以我誤解了她的話。Reading (3a: P29)Ask and answer 1. What is this article about? I think it is about the invention of tea. 2. Was

8、 it invented on purpose or by accident? By accident. The first sentence tells us that.3. When was it invented? Over 3,000 years before 1610. 4. Who invented it? The emperor Shen Nong.Ask and answer5. Who can tell us how it was invented? According to an ancient legend, once when Shen Nong was boiling

9、 drinking water over an open fire, some leaves from a nearby bush fell into the water and remained there for some time. He noticed that the leaves in the water produced a pleasant smell. Later he tasted the water and found it quite delicious. Thats how he discovered tea.Explanation1. Although tea wa

10、snt brought to the western world until 1610, this beverage was discovered over three thousand years before that. 雖然茶直到雖然茶直到1610年才傳入西方世界年才傳入西方世界,但這種飲料在三千多年前就被發(fā)現(xiàn)了。但這種飲料在三千多年前就被發(fā)現(xiàn)了。(1) although 作連詞作連詞, 意為意為 “雖然雖然,盡盡管管”,引導讓步狀語從句引導讓步狀語從句, 我們不能根據(jù)我們不能根據(jù)漢語習慣漢語習慣, 在后面使用連詞在后面使用連詞but, 不過它不過它可以與可以與yet, still連用連

11、用;若主從句的主語相若主從句的主語相同同, 且從句謂語含有動詞且從句謂語含有動詞be, 可將從句可將從句主語和動詞主語和動詞be省略。省略。 Although (it was) snowing, it was not very cold. 雖然在下雪雖然在下雪, 但是天氣不是很冷。但是天氣不是很冷。 There is air around us, although we cant see it. 盡管我們看不見盡管我們看不見, 但我們周圍全是空氣。但我們周圍全是空氣。 notuntil 意為意為 “直到直到才才”until 引導一個時間狀語從句。引導一個時間狀語從句。 He did not g

12、o to bed until his father came home. 直到他爸爸回家時他才睡覺。直到他爸爸回家時他才睡覺。2. According to an ancient Chinese legend, the emperor Shen Nong discovered tea when he was boiling drinking water over an open air. 根據(jù)中國古代的一個傳說根據(jù)中國古代的一個傳說, 神農(nóng)帝在神農(nóng)帝在戶外的火上燒飲用水時發(fā)現(xiàn)了茶葉。戶外的火上燒飲用水時發(fā)現(xiàn)了茶葉。 According to 是個短語介詞是個短語介詞,意為意為 “根根據(jù)據(jù);依照

13、依照”后接代詞后接代詞,名詞或由疑名詞或由疑問詞以及問詞以及whether引出的名詞性從句。引出的名詞性從句。 According to the radio, it will rain tomorrow. 根據(jù)收音機說根據(jù)收音機說,明天有雨。明天有雨。 According to what you said just now, he was right then. 根據(jù)你剛才說的根據(jù)你剛才說的,那么他就對了。那么他就對了。3. Some leaves from a nearby bush fell into the water and remained there for some time.

14、一些葉子從附近的灌木叢落到水里。一些葉子從附近的灌木叢落到水里。并在水里浸泡了一段時間。并在水里浸泡了一段時間。leaf 的復數(shù)形式為的復數(shù)形式為leavesremain 表示表示 “繼續(xù)留在某處繼續(xù)留在某處” How long will you remain here? 你要在此地停留多久你要在此地停留多久?fall into “落入落入, 陷入陷入” He was drunk and fell into the water. 他酒醉跌落水中。他酒醉跌落水中。Writing (3b:)A sample article From pie plate to flying disk The flying disk was invented by college students. Flying disk is a metal pie plate. In the 1950s, several college students ate pies made by a bakery in Bridgeport, Connecticut. T